/* KeepThings 사이트 — 토큰은 docs/DESIGN.md §2~4에서 왔다. 표 밖 값 금지. */
:root {
  --kt-canvas: #F4F1EA;
  --kt-bg: #FBF9F5;
  --kt-surface: #FFFFFF;
  --kt-text: #1C1B19;
  --kt-text-sub: #5C564C;
  --kt-text-strong: #3D382F;
  --kt-accent: #2E5F4F;
  --kt-accent-deep: #255045;
  --kt-accent-tint: #F3EFE7;
}

* { box-sizing: border-box; }

/* 글자 크기는 rem — 브라우저 기본 크기 설정을 존중한다 (조언 H).
   1rem = 16px 기준, DESIGN.md §3의 pt 값을 그대로 환산했다. */
body {
  margin: 0;
  padding: 40px 20px 64px;
  background: var(--kt-bg);
  color: var(--kt-text);
  font: 400 1.0625rem/1.65 Pretendard, system-ui, -apple-system, sans-serif;
  overflow-wrap: break-word;
}

main { max-width: 42.5rem; margin: 0 auto; }

h1 { font-size: 1.75rem; font-weight: 600; line-height: 1.35; margin: 0 0 24px; }
h2 { font-size: 1.25rem; font-weight: 600; margin: 40px 0 12px; }
h3 { font-size: 1.0625rem; font-weight: 500; margin: 24px 0 4px; }
p { margin: 0 0 16px; }

a { color: var(--kt-accent); }
a:hover { color: var(--kt-accent-deep); }
a:focus-visible {
  color: var(--kt-accent-deep);
  outline: 2px solid currentColor;
  outline-offset: 4px;
  border-radius: 8px;
}

.sub { color: var(--kt-text-sub); }
.meta { font-size: 0.8125rem; color: var(--kt-text-sub); }

table { border-collapse: collapse; width: 100%; margin: 0 0 16px; }
th, td {
  text-align: left; padding: 8px 12px;
  border: 1px solid var(--kt-accent-tint);
  background: var(--kt-surface);
}
th { font-weight: 500; }

footer {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--kt-accent-tint);
  font-size: 0.9375rem;
}

/* 루트 페이지 — B2 앱 아이콘과 같은 조용한 종이·딥그린 언어. */
.home {
  padding: 0 20px 48px;
  background: var(--kt-canvas);
}

.site-header {
  width: 100%;
  max-width: 72rem;
  min-height: 88px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--kt-text);
  font-size: 1.25rem;
  font-weight: 600;
  text-decoration: none;
}

.brand img {
  display: block;
  width: 48px;
  height: 48px;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.9375rem;
}

.site-header nav a { text-decoration-thickness: 1px; text-underline-offset: 4px; }

.home-main { max-width: 72rem; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(20rem, 0.88fr);
  align-items: center;
  gap: 64px;
  padding: 48px;
  background: var(--kt-surface);
  border: 1px solid var(--kt-accent-tint);
  border-radius: 20px;
}

.hero-copy { max-width: 32rem; }

.hero h1 {
  margin: 0 0 24px;
  font-size: 2.125rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.intro {
  max-width: 28rem;
  margin-bottom: 32px;
  color: var(--kt-text-strong);
  font-size: 1.25rem;
  line-height: 1.6;
}

.trust-list {
  display: grid;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--kt-accent-tint);
  color: var(--kt-text-sub);
  font-size: 0.9375rem;
}

.trust-list p {
  position: relative;
  margin: 0;
  padding-left: 20px;
}

.trust-list p::before {
  content: "";
  position: absolute;
  top: 0.7em;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--kt-accent);
  transform: translateY(-50%);
}

.product-preview {
  position: relative;
  min-height: 40rem;
  margin: 0;
  padding: 40px 32px 0;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  overflow: hidden;
  isolation: isolate;
  background: var(--kt-accent-deep);
  border-radius: 20px;
}

.product-preview::before,
.product-preview::after {
  content: "";
  position: absolute;
  z-index: -1;
  border: 1px solid rgba(243, 239, 231, 0.18);
  border-radius: 999px;
}

.product-preview::before {
  width: 20rem;
  height: 20rem;
  top: -8rem;
  right: -8rem;
}

.product-preview::after {
  width: 12rem;
  height: 12rem;
  left: -4rem;
  bottom: 6rem;
}

.hero-icon {
  position: absolute;
  z-index: 2;
  top: 32px;
  left: 32px;
  width: 96px;
  height: 96px;
  filter: drop-shadow(0 12px 20px rgba(28, 27, 25, 0.2));
}

.screen-frame {
  width: 100%;
  max-width: 17.5rem;
  padding: 8px 8px 0;
  background: var(--kt-surface);
  border-radius: 20px 20px 0 0;
  box-shadow: 0 24px 64px rgba(28, 27, 25, 0.2);
}

.shot {
  display: block;
  width: 100%;
  height: auto;
  margin: 0;
  border: 0;
  border-radius: 12px 12px 0 0;
}

.home footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  color: var(--kt-text-sub);
}

.footer-links { text-align: right; }

@media (min-width: 48rem) {
  .hero h1 { font-size: 4rem; }
}

@media (max-width: 47.9375rem) {
  .home { padding-right: 16px; padding-left: 16px; }

  .site-header {
    min-height: 80px;
    align-items: center;
  }

  .site-header nav { gap: 16px; }
  .site-header nav a:first-child { display: none; }

  .hero {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 32px 20px 0;
  }

  .hero-copy { padding: 8px 4px 0; }
  .product-preview { min-height: 36rem; margin: 0 -20px; border-radius: 20px 20px 0 0; }
  .hero-icon { top: 24px; left: 24px; width: 80px; height: 80px; }

  .home footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .footer-links { text-align: left; }
}